Method of producing high-melting paraffin and ceresine



Patented Sept. 29, 1931 UNITED STATES PATENT OFFICE ALBERT LOEBEL, F .AllZS'I-ERIDAM, NETHERLANDS, ASSIGNOR TO DE BATAAFSCHE V PETROLEUM MAATSCHAPPIJ', OF THE HAGUE, NETHERLANDS METHOD OF PRODUCING HIGH-MEIJTING PARAFFIN CERESINE No Drawing. Application filed October 22, 1928, Serial No. 314,328, and in the Netherlands November It is known that paraffin may be obtained from distilling those oils whichhave either a paraffin or a mixed paraffin-asphalt base.

Mixed base oils may only be distilled to a certain amount, for if the distillation is carried further the distillates are very diiiicult to handle; as a rule, therefore, the distillation is carried on until products are distilled over, which have a co'ngealing point of more than 60 0., the residue being left in the still. The residue comprises a mixture of asphalt and the greater part of the hard paraflin contained in the raw material. In its original state this residue cannot be worked, but since it contains very valuable products many attempts have been made to find a rational and suitable method for treating it, in order to obtain the said valuable products. These attempts have not yet met with much sliccess.

I found that the residue described above may be rationally treated and valuable products obtained therefrom in a comparatively easy manner in adding, before or during the distillation of one or more hydrocarbons alone or in mixture with other substances, which are soluble in liquid S0 for example Edeleanu-extract coal tar and/or cracking residue as is obtained by the well-known in cracking process.

Example I To the residue remaining in the still is mixed A say an equal part of Edeleanu-extract of a o lubricant oil fraction, andafter'which distilling is continued until practically all the hard parafiin is separated. The paraflin distills out and can be further treated in known manner while the residue left in the still is a wry useful asph E'wample II The same residueof a primary distillation as contemplated in Example I is mixed with u an equalguantity of Dub s cracking residue,

and is then steamed-distilled until nearly all the hardparaflin is distilled over. There remains a residue in the still, which residue is a hard asphalt. The distillation may be further treated in known manner.

It is obvious that the invention is suscep tible to certain modifications, and it is intended that it be limited only by the scope of the appended claims.

1. A process of producing high melting paraflin from the distillation residue of mixed base oil obtained by, distilling oil the fractions boiling up to approximately 400 Centigrade, comprising adding to the said residue one or more hydrocarbons boiling above 200 centi ade which are materially soluble in liquid 0 subsequently distilling the mixture and separating the hard parafiin from the distillate obtained.

2. A rocess of producing high meltin paraflin om the distillation residue of mixe ase oil obtained by distilling ofi' the'frac-- tions boiling up to approximatel 400 Centigrade, comprising adding to t e said vresidue Edeleanu-extract boiling above 200 centigrade, subsequently distilling the mixture and separating the hard paraflin from the distillate obtained.

In testimony whereof I have name to this specification.

ALBERT LOEBEL.

signed my 

